DE1592006A1 - Process and apparatus for degassing the electrolyte used in sodium chloride electrolysis - Google Patents

Description

"Process and apparatus for degassing the electrolyte, which is used in ITsodium chloride electrolysis "

The invention relates to a method and a Apna.rat for degassing the electrolyte that is used in the fatty acid chloride electrolysis with mercury cathode and monoblock anode is used.

The ancestor for separating the chlorine from the is known Brine, according to which this is initially acidified with HOl and afterwards in one with Rasohig rings or distribution; sb. Öden provided tower, under a vacuum of 400 - 450 mm Hg ■ Column is degassed, [under these conditions the chlorine content falls from 0.3 to 0.1 g / l.

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This is then followed by blowing air through columns. different forms, whereby the chlorine content is reduced to approx. 0.01 g / l. The remaining chlorine is destroyed chemically, . -

The factual part of this procedure is that it is complicated and high vacuum required.

Another known method provides for the alkalization of the brine, followed by the flow of the same in two stages over graphite in pieces. The technical part of this process consists in the fact that there is a large consumption of soda, about 1 ^{liter of} the production of caustic soda for a chlorine content of 0.4 g / l.

Furthermore, a degasser is known for liquids, consisting of a tubular column which is closed at its upper end with an annular diaphragm on which a pulverizing chamber is coaxially attached and provided with a connection for the vacuum pump. with the help of which a vacuum of the order of a few tens of millimeters of mercury is maintained in the column. The column is axially traversed by a line that has an atomizer at the upper end and that of distribution trays and collecting trays. which are in the process of rotation, the liquid is absorbed and under the influence of the

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Kuums powdered, with most of the gas separated will; then it flows over the column bottoms, "where the complete Degassing. Takes place,

This degasser has the disadvantage that it has a high vacuum This is because of the risk of clogging the atomizer nozzles can only be used for degassing the brine.

The above invention eliminates the disadvantages mentioned above in that the degassing is carried out by atomizing the electrolyte with the help of movable discs and by successively passing through several floors, in a closed room, under a vacuum of 600 - 650 mm mercury column and a temperature of approx. 60 C ₅ whereby the process takes place in a preparation which is provided with one or more atomizer disks, which are symmetrically arranged and which are driven from the outside and which has a number of floors on the underside which are provided with through openings and is equipped at the top with a spike containing filling units for holding back the droplets entrained by the gaseous chlorine released,

It f01,5t an example for the realization of the invention in To:; ammenhnn, ": with Fig. 1, which represents a 3kiz? 5e of the apparatus-π ^ eIIt.

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The electrolyte with a content of about $ chlorine, which in the

Electrolysis process arises, is introduced into another device (1), which is made of sheet steel protected with rubber and ebonite is built.

The electrolyte introduced through one or more nozzles (2) falls over one or more movable disks (3), which are provided with symmetrically distributed Eugen and channels, by rotating them to 1500 to 3000 per minute the Ohlor pulverized and set free. The electrolyte then reaches the floors (4), which have surface elements are provided, which favorably extend the time the electrolyte remains under vacuum and in this way contribute to a good degassing and to an increase of the process. The transition of the electrolyte from one Floor to the other takes place through the openings (5), which are mounted on opposite sides of the floors in this way are that the degassing process of the electrolyte continues until it exits the apparatus through the nozzle (6).

The released chlorine is let out through the mandrel (7), which is provided with Raschig rings, which have the purpose of remove the entrained electrolyte and are sucked up with the help of a 600 - 650 mm Hg column through the nozzle (8).

An apparatus with a usable volume of 1 m, which is less than 600 - 650 mm

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Mercury column vacuum works, "at a temperature of approx, 60 ° G, can degas 150 - 18 square meters of electrolyte in one hour, whereby the chlorine content is reduced from approx. 1 g / l to 0.0 g / l will, . .

'The invention offers the advantage of degassing a brine with a high chlorine content, in an apparatus of great productivity under easily realizable conditions. The method and the apparatus can also be used in other degassing processes for certain electrolytes with a high chlorine content used and is therefore primarily intended for the degassing of the sodium chloride in the electrolysis Electrolytes used with mercury cathode and monoblock anode. . - .- ..

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Claims;

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Claims (4)

- D - claims 1. Process for the gasification of the in the electrolysis of the - sodium chloride with mercury cathode and monoblock anode electrolytes used, characterized in that degassing is achieved by atomizing the electrolyte with Is achieved with the help of movable panes, as well as by the gradual overflow over several floors -. works in a closed room under a vacuum of 600 - 650 mm mercury and a temperature from approx. 60 0. 2. Apparatus for the "implementation of the method ^ em ^:: ss claim. 1, characterized in that it is provided with one or more atomizer disks (3;) which are symmetrically distributed and are driven from the outside and in the lower part a Number of floors (4) loading t sits, which are provided with a through opening en oi) and on the upper side with a pin (7), which does not have filler elements for holding back the from. released gaseous onIor entrained droplets is provided. 3. Apparatus according to claim 2, characterized in that for the purpose of securing atomization and four increase of the degassing process, the atomizer discs (3) with grooves and channels and the floors (4) with a number corresponding cursing elements are provided, 0 0 9 8 3 6/1581 ^ßAD original 4. Aoparat geinäss claim 2 and 3, characterized in that it is protected inside with "known corrosion protection materials and with connecting pieces for the inlet (2) and _# . .: - Letting out (6) the electrolyte, as well as for evacuation of chlorine (8) is provided. 0O9836 / 1E81 BAD ORIG'NAL r * · ♦ Blank page